<!DOCTYPE HTML>
<html class="reftest-wait">
<body style="margin:0;">
<div id="t" style="width:100px; height:100px; background:yellow;">
  <div style="position:fixed; left:50px; top:50px; width:100px; height:100px; background:orange;"></div>
</div>
<script>
function doTest() {
  document.getElementById("t").style.transform = "translate(80px,20px)";
  document.documentElement.removeAttribute("class");
}
window.addEventListener("MozReftestInvalidate", doTest, false);
</script>
</body>
</html>
